Hallo, i am trying to distort an image to fit to a skewed / distorted shape.
For example when i give the 4 corners of a shape and make it fit there even though it is not a rectangle.
I tried the easy way with vertex() and texture() like below - from the vertex() examples… in processing’s site…
PImage img;
void setup(){
size(200, 200,P3D);
img = loadImage("laDefense.png");}
void draw(){
background(255);
noStroke();
beginShape();
texture(img);
// "laDefense.jpg" is 100x100 pixels in size so
// the values 0 and 100 are used for the
// parameters "u" and "v" to map it directly
// to the vertex points
vertex(mouseX, mouseY, 0, 0);
vertex(80, 5, 100, 0);
vertex(95, 90, 100, 100);
vertex(40, 95, 0, 100);
endShape();
}
but the image inside the texture does not seem to always retain every pixels correct placing / mapping.
could you help me achieve that with the pixel array?
I saw this sketch that achieves that with wrap too which is more complicates (but i do not understand the math).
How could i achieve that by just giving the new upper left, upper right lower left and lower right corner’s coordinates, and distort the image there correctly?
https://www.openprocessing.org/sketch/170639
thank you in advance